FRESHLY SINGLE (FDR THE FIFTH TIME) AND STARRING IN A CONTROVERSIAL NEW VERSION OF "THE ALAMO," BILLY BOB THORNTON HAS A LOT ON HIS MIND— PARASITES AND FATIGUE, FOR STARTERS. INVESTIGATES WHY ONE OF HOLLYWOOD'S FINEST ACTORS IS ALSO TTS MOST NEUROTIC BIl.l V BDB S BIO H0U5E III 3r.i .1/ Mil s l